package com.foton.logistic.util;

import java.util.HashMap;
import java.util.regex.Pattern;

public class Idcard

{

    private String _codeError;

    //wi =2(n-1)(mod 11)
    final int[] wi = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1};
    // verify digit
    final int[] vi = {1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2};
    private int[] ai = new int[18];
    private static String[] _areaCode={"11","12","13","14","15","21","22"
            ,"23","31","32","33","34","35","36","37","41","42","43","44"
            ,"45","46","50","51","52","53","54","61","62","63","64","65","71","81","82","91"};
    private static HashMap<String,Integer> dateMap;
    private static HashMap<String,String> areaCodeMap;
    static{
        dateMap=new HashMap<String,Integer>();
        dateMap.put("01",31);
        dateMap.put("02",null);
        dateMap.put("03",31);
        dateMap.put("04",30);
        dateMap.put("05",31);
        dateMap.put("06",30);
        dateMap.put("07",31);
        dateMap.put("08",31);
        dateMap.put("09",30);
        dateMap.put("10",31);
        dateMap.put("11",30);
        dateMap.put("12",31);
        areaCodeMap=new HashMap<String,String>();
        for(String code:_areaCode){
            areaCodeMap.put(code,null);
        }
    }

    //验证身份证位数,15位和18位身份证
    public boolean verifyLength(String code){
        int length=code.length();
        if(length==15 || length==18){
            return true;
        }else{
            _codeError="错误：输入的身份证号不是15位和18位的";
            return false;
        }
    }

    //判断地区码
    public boolean verifyAreaCode(String code){
        String areaCode=code.substring(0,2);
//            Element child=  _areaCodeElement.getChild("_"+areaCode);
        if(areaCodeMap.containsKey(areaCode)){
            return true;
        }else{
            _codeError="错误：输入的身份证号的地区码(1-2位)["+areaCode+"]不符合中国行政区划分代码规定(GB/T2260-1999)";
            return false;
        }
    }

    //判断月份和日期
    public boolean verifyBirthdayCode(String code){
        //验证月份
        String month=code.substring(10,12);
        boolean isEighteenCode=(18==code.length());
        if(!dateMap.containsKey(month)){
            _codeError="错误：输入的身份证号"+(isEighteenCode?"(11-12位)":"(9-10位)")+"不存在["+month+"]月份,不符合要求(GB/T7408)";
            return false;
        }
        //验证日期
        String dayCode=code.substring(12,14);
        Integer day=dateMap.get(month);
        String yearCode=code.substring(6,10);
        Integer year=Integer.valueOf(yearCode);

        //非2月的情况
        if(day!=null){
            if(Integer.valueOf(dayCode)>day || Integer.valueOf(dayCode)<1){
                _codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号不符合小月1-30天大月1-31天的规定(GB/T7408)";
                return false;
            }
        }
        //2月的情况
        else{
            //闰月的情况
            if((year%4==0&&year%100!=0)||(year%400==0)){
                if(Integer.valueOf(dayCode)>29 || Integer.valueOf(dayCode)<1){
                    _codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号在"+year+"闰年的情况下未符合1-29号的规定(GB/T7408)";
                    return false;
                }
            }
            //非闰月的情况
            else{
                if (Integer.valueOf(dayCode) > 28 || Integer.valueOf(dayCode) < 1) {
                    _codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号在"+year+"平年的情况下未符合1-28号的规定(GB/T7408)";
                    return false;
                }
            }
        }
        return true;
    }

    //验证身份除了最后位其他的是否包含字母
    public boolean containsAllNumber(String code) {
        String str="";
        if(code.length()==15){
            str=code.substring(0,15);
        }else if(code.length()==18){
            str=code.substring(0,17);
        }
        char[] ch = str.toCharArray();
        for (int i = 0; i < ch.length; i++) {
            if (! (ch[i] >= '0' && ch[i] <= '9')) {
                _codeError="错误：输入的身份证号第"+(i+1)+"位包含字母";
                return false;
            }
        }
        return true;
    }

    public String getCodeError(){
        return _codeError;
    }

    //验证身份证
    public boolean verify(String idcard) {
        _codeError="";
        //验证身份证位数,15位和18位身份证
        if(!verifyLength(idcard)){
            return false;
        }
        //验证身份除了最后位其他的是否包含字母
        if(!containsAllNumber(idcard)){
            return false;
        }

        //如果是15位的就转成18位的身份证
        String eifhteencard="";
        if (idcard.length() == 15) {
            eifhteencard = uptoeighteen(idcard);
        }else{
            eifhteencard=idcard;
        }
        //验证身份证的地区码
        if(!verifyAreaCode(eifhteencard)){
            return false;
        }
        //判断月份和日期
        if(!verifyBirthdayCode(eifhteencard)){
            return false;
        }
        //验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统
        if(!verifyMOD(eifhteencard)){
            return false;
        }
        return true;
    }

    public boolean verifyOther(String code){
        String regex = "^[^\\s]{0,30}$";
        return Pattern.matches(regex,code);
    }

    //验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统
    public boolean verifyMOD(String code){
        String verify = code.substring(17, 18);
        if("x".equals(verify)){
            code=code.replaceAll("x","X");
            verify="X";
        }
        String verifyIndex=getVerify(code);
        if (verify.equals(verifyIndex)) {
            return true;
        }
//            int x=17;
//            if(code.length()==15){
//                  x=14;
//            }
        _codeError="错误：输入的身份证号最末尾的数字验证码错误";
        return false;
    }

    //获得校验位
    public String getVerify(String eightcardid) {
        int remaining = 0;

        if (eightcardid.length() == 18) {
            eightcardid = eightcardid.substring(0, 17);
        }

        if (eightcardid.length() == 17) {
            int sum = 0;
            for (int i = 0; i < 17; i++) {
                String k = eightcardid.substring(i, i + 1);
                ai[i] = Integer.parseInt(k);
            }

            for (int i = 0; i < 17; i++) {
                sum = sum + wi[i] * ai[i];
            }
            remaining = sum % 11;
        }

        return remaining == 2 ? "X" : String.valueOf(vi[remaining]);
    }

    //15位转18位身份证
    public String uptoeighteen(String fifteencardid) {
        String eightcardid = fifteencardid.substring(0, 6);
        eightcardid = eightcardid + "19";
        eightcardid = eightcardid + fifteencardid.substring(6, 15);
        eightcardid = eightcardid + getVerify(eightcardid);
        return eightcardid;
    }

}